U.S. patent number 7,819,530 [Application Number 11/791,332] was granted by the patent office on 2010-10-26 for auxiliary device equipped with projector for use with an electronic device, and electronic camera system incorporating the auxiliary device.
This patent grant is currently assigned to Nikon Corporation. Invention is credited to Nobuhiro Fujinawa, Hirotake Nozaki.
United States Patent |
7,819,530 |
Nozaki , et al. |
October 26, 2010 |
Auxiliary device equipped with projector for use with an electronic
device, and electronic camera system incorporating the auxiliary
device
Abstract
An cradle 100 equipped with a projector commands the power
supply to an electronic camera 200 that is mounted on the cradle
100 to be turned on and the display of a main liquid crystal
display 201 to be turned off in response to an on signal from a
projection switch 101. A CPU 131 (FIG. 2) is provided in the cradle
100, and the CPU 131 (FIG. 2) performs expansion processing on the
image data transmitted to the cradle 100 from the electronic camera
200 if the image data is compressed. The CPU 131 (FIG. 2) of the
cradle 100 performs resizing processing on the image data having
been expanded according to a projection resolution of the projector
unit and records the resized data in a memory card. The CPU 131
reads out the resized image data from the memory card and performs
replay processing to project the image data via the projector
unit.
Inventors: |
Nozaki; Hirotake
(Portwashington, NY), Fujinawa; Nobuhiro (Yokohama,
JP) |
Assignee: |
Nikon Corporation (Tokyo,
JP)
|
Family
ID: |
36498063 |
Appl.
No.: |
11/791,332 |
Filed: |
November 25, 2005 |
PCT
Filed: |
November 25, 2005 |
PCT No.: |
PCT/JP2005/021662 |
371(c)(1),(2),(4) Date: |
May 23, 2007 |
PCT
Pub. No.: |
WO2006/057329 |
PCT
Pub. Date: |
June 01, 2006 |
Prior Publication Data
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|
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Document
Identifier |
Publication Date |
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US 20080049200 A1 |
Feb 28, 2008 |
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Foreign Application Priority Data
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Nov 29, 2004 [JP] |
|
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2004-343540 |
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Current U.S.
Class: |
353/72;
353/119 |
Current CPC
Class: |
G03B
29/00 (20130101); G03B 21/12 (20130101); G03B
17/48 (20130101); H04N 9/3141 (20130101); H04N
1/00347 (20130101); H04N 1/00129 (20130101); H04N
1/00204 (20130101); H04N 2201/0041 (20130101); H04N
2201/0058 (20130101); H04N 2201/0065 (20130101) |
Current International
Class: |
G03B
21/30 (20060101); G03B 21/22 (20060101) |
Field of
Search: |
;353/122,119,72
;348/207.2,207.99 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
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A 05-137039 |
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Jun 1993 |
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JP |
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A 06-237403 |
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Aug 1994 |
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JP |
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A 07-131689 |
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May 1995 |
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JP |
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A 08-146512 |
|
Jun 1996 |
|
JP |
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A 2002-171428 |
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Jun 2002 |
|
JP |
|
Primary Examiner: Luu; Thanh X
Attorney, Agent or Firm: Miles & Stockbridge P.C.
Claims
The invention claimed is:
1. An auxiliary device for an electronic device, comprising: a
device mounting section to which the electronic device is mounted;
a communication unit that performs communication with the
electronic device mounted in the device mounting section; a
projector device that projects an image created upon an optical
image formation element; a projection control unit that acquires
image data from the electronic device via the communication unit,
and controls the projector device so as to project an image
according to the acquired image data; an operating unit that
operates the projector device, and that is disposed, with respect
to the electronic device mounted upon the device mounting section,
on a side opposite to a direction of projection; a resize
processing unit that performs resizing processing of the image data
acquired from the electronic device, according to a projection
resolution of the projector device; and a recording unit that
records the image data after the resizing processing in a recording
medium.
2. An auxiliary device for an electronic device according to claim
1, further comprising: a control unit that, upon a projection
command, transmits from the communication unit a signal that
commands the electronic device to turn off its display unit.
3. An auxiliary device for an electronic device according to claim
1, wherein: the projection control unit acquires the image data in
an order beginning with the image data that has been most recently
recorded on the electronic device.
4. An auxiliary device for an electronic device according to claim
2, wherein: the projection control unit controls the projector
device so as to project an image that indicates a state of
communication with the electronic device.
5. An auxiliary device for an electronic device according to claim
4, further comprising: an electrical power supply unit that
supplies charging electrical power to the electronic device;
wherein the projection control unit controls the projector device
so as to project an image that indicates a state of charging of the
electronic device.
6. An auxiliary device for an electronic device according to claim
2, wherein: the projection control unit acquires a video signal
from the electronic device, and controls the projector device so as
to project a replay image according to the video signal.
7. An electronic camera system, comprising: an auxiliary device for
an electronic device according to claim 1, and an electronic camera
that outputs at least one of image data that has been photographed
and a video signal for replaying an image that has been
photographed.
Description
TECHNICAL FIELD
The present invention relates to an auxiliary device for an
electronic device, that is used along with an electronic device
such as an electronic camera or the like.
BACKGROUND ART
As an auxiliary device for an electronic device, a cradle is known
that supplies electrical current for charging up an electronic
device such as a portable telephone or the like powered by a
rechargeable battery, and that performs communication with the
electronic device. On the other hand, a projector device that
projects an image or the like such as an optical image upon a
screen or the like is also widely employed. The present inventors
consider that, in a case in which an electronic device to be
mounted in a cradle is handling images, if a structure is provided
in which the cradle is endowed with a projector function, then it
is convenient to be able to associate the electronic image with the
projector via the cradle. At the present time, no precedent
technical information has been found that affords any description
in relation to such a cradle endowed with a projector function.
DISCLOSURE OF THE INVENTION
Problem to be Solved by the Invention
An auxiliary device for an electronic device equipped with a
projector with a good operability is to be provided by mounting a
projector to the auxiliary device for an electronic device to which
an electronic device that handles electronic images is mounted, and
thereby to provide
Means for Solving the Problems
An auxiliary device for an electronic device equipped with a
projector according to a first aspect of the present invention
includes: a device mounting section to which the electronic device
is mounted; a communication unit that performs communication with
the electronic device mounted in the device mounting section; a
projector device that projects an image created upon an optical
image formation element; and a projection control unit that
controls the projector device so as to project an image that is
created using a signal acquired from the electronic device via the
communication unit.
According to a second aspect of the present invention, it is
preferable that the auxiliary device for an electronic device
equipped with a projector according to the first aspect to further
include a control unit that, upon a projection command, transmits
from the communication unit a signal that commands the electronic
device to turn off its display unit.
According to a third aspect of the present invention, in the
auxiliary device for an electronic device equipped with a projector
according to the second aspect, it is preferable that the
projection control unit acquires image data from the electronic
device, and controls the projector device so as to project a replay
image according to the acquired image data.
According to a fourth aspect of the present invention, in the
auxiliary device for an electronic device equipped with a projector
according to the third aspect, it is preferable that the projection
control unit acquires the image data in order from a newest.
According to a fifth aspect of the present invention, it is
preferable that the auxiliary device for an electronic device
equipped with a projector according to the second or third aspect
to further include: a resize processing unit that performs resizing
processing upon the image data acquired from the electronic device,
according to a projection resolution of the projector device; and a
recording unit that records the image data after the resizing
processing upon a recording medium.
According to a sixth aspect of the present invention, in the
auxiliary device for an electronic device equipped with projector
according to any one of the second to fifth aspect, it is
preferable that the projection control unit controls the projector
device so as to project an image that indicates a state of
communication with the electronic device.
According to a seventh aspect of the present invention, the
auxiliary device for an electronic device equipped with a projector
according to the sixth aspect may further include an electrical
power supply unit that supplies charging electrical power to the
electronic device. In this case, it is preferable that the
projection control unit controls the projector device so as to
project an image that indicates a state of charging of the
electronic device.
According to a eighth aspect of the present invention, in the
auxiliary device for an electronic device equipped with a projector
according to the second aspect, it is preferable that the
projection control unit acquires a video signal from the electronic
device, and controls the projector device so as to project a replay
image according to the video signal.
An electronic camera system according to a ninth aspect of the
present invention includes: an auxiliary device for an electronic
device equipped with a projector according to any one of the first
to eighth aspect, and an electronic camera that outputs at least
one of image data that has been photographed and a video signal for
replaying an image that has been photographed.
The above communication unit may be replaced with a communication
means.
The above projection control unit may be replaced with a projection
control means.
The above control unit may be replaced with a control means.
The above resize processing unit may be replaced with a resize
processing means.
Advantageous Effect of the Invention
Since, according to the present invention, a structure is provided
by which an image that has been created using a signal acquired
from an electronic device that is mounted in the device mounting
section is projected, therefore an auxiliary device for an
electronic device equipped with a projector is obtained, of which
the convenience of use is good.
Moreover since, according to another aspect of the present
invention, a structure is provided by which an image that has been
created using a signal acquired from an electronic camera that is
mounted in the device mounting section is projected, therefore an
electronic camera system is obtained, of which the convenience of
use is good.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a perspective view of an electronic camera system
according to a first embodiment of the present invention;
FIG. 2 is a block diagram for explanation of the electronic camera
system of FIG. 1;
FIG. 3 is a flow chart for explanation of the flow of a main
processing program that is executed by a CPU of a cradle; and
FIG. 4 is a flow chart for explanation of the flow of a main
processing program according to a second embodiment.
BEST MODE FOR CARRYING OUT THE INVENTION
In the following, preferred embodiments for implementation of the
present invention will be explained with reference to the
drawings.
First Embodiment
FIG. 1 is a perspective view of an electronic camera system
according to a first embodiment of the present invention. In FIG.
1, an electronic camera 200 is mounted upon a cradle 100 in a
device mounting section 100S, with its rear surface towards the
viewer. This cradle 100 is connected to a personal computer 300 via
a USB cable 51. The commercial power is supplied to the cradle 100
via a power supply cable 52.
The cradle 100 is provided with a projection switch (on/off) 101, a
backward switch 102, a forward switch 103, a display changeover
switch 104, a delete switch 105, a memory slot 106, and a projector
projection window (not shown in the figures). A projector unit that
will be described hereinafter is incorporated in the cradle 100,
and this projector unit projects information such as an image or
the like towards a screen or the like from the projector projection
window. The reference symbol P in FIG. 1 denotes this projected
image.
On the rear surface of the electronic camera 200, there are
provided a main liquid crystal display unit 201, actuation members
202, and a viewfinder eyepiece window 203. The actuation members
202 include a menu button (MENU), a display button (DISP), a
cruciform actuation key, and the like. On the upper surface of the
electronic camera 200, there are provided a main switch (Power) and
a shutter release button 205. Moreover, on the front of the
electronic camera 200, there are provided a photographic lens, a
viewfinder objective window, and a flash light window (none of
which are shown in the figure).
FIG. 2 is a block diagram for explanation of the electronic camera
system of FIG. 1.
The Cradle
Referring to FIG. 2, the cradle 100 includes a projector unit 120,
a CPU 131, a memory 132, actuation members 110, a video interface
(VIDEO I/F) 133, a LAN interface (LAN I/F) 134, a USB interface
(USB I/F) 135, an external power supply circuit 136, a camera
interface 137, and a speaker 138. A removable memory card 150 is
fitted in the memory slot 106 (FIG. 1). The actuation members 110
correspond to the various switches 101 through 105 described
above.
Based upon a cradle control program, the CPU 131 performs control
of communication operation and projector operation by performing
predetermined calculations and the like using signals that are
inputted from the various units of the cradle 100 and outputting
control signals to the various units of the cradle 100. It should
be understood that this cradle control program is stored in a
non-volatile memory within the CPU 131, not shown in the figures.
The CPU 131 includes a timer circuit not shown in the figures, and
also performs time measurement processing for obtaining time
instant information.
The memory 132 is used as a working memory for the CPU 131. The
memory card 150 consists of a non-volatile memory such as a flash
memory or the like, and writing and storage of data therein and
reading out of data therefrom can be performed according to
commands from the CPU 131.
The video interface (VIDEO I/F) 133 creates a video signal for
displaying upon an external television monitor or the like a replay
image according to image data or a video signal that is transmitted
via the camera interface 137 when the electronic camera 200 is
mounted upon the cradle 100, or a replay image according to image
data that is read out from the memory card 150 when the electronic
camera 200 is not mounted upon the cradle 100. By connecting such
an external television monitor or the like to the video interface
(VIDEO I/F) 133, this replay image is displayed upon the television
monitor.
According to commands from the CPU 131, the LAN interface (LAN I/F)
134 performs transmission and reception of data to and from another
external device (such as, for example, a DVD recorder/player, a
monitor camera, or the like) that is connected by a LAN cable (not
shown in the figures). The USB interface (USB I/F) 135 performs
transmission and reception of data to and from an other external
device (such as, for example, the personal computer 300, a printer,
a photo data storage device, or the like) that is connected via the
USB cable 51.
The external power supply circuit 136 consists of an AC/DC
conversion circuit or the like, and converts AC voltage that is
inputted via the power supply cable 52 to the DC voltage required
by the various sections within the cradle 100, and supplies this
voltage after conversion to the various blocks thereof. This
external power supply circuit 136 further supplies a charge
electrical current that is required for charging up the
rechargeable battery within the camera 200 to the electronic camera
200 via the camera interface 137.
When the electronic camera 200 is mounted upon the cradle 100, the
camera interface 137 performs data communication with the
electronic camera 200 according to commands from the CPU 131, and
supply of charging electrical current. In the camera interface 137,
there are included a control interface line ("Control I/F") that
sends and receives control signals, a video interface line ("VIDEO
I/F") that sends and receives video signals, a digital interface
line ("Digital I/F") that sends and receives image data and/or
audio data, and a power supply line that supplies charging
electrical current.
According to commands from the CPU 131, the speaker 138 replays
sound due to audio data that is outputted from the CPU 131 or that
is transmitted from the electronic camera 200 via the camera
interface 137. The actuation members 110 output actuation signals
to the CPU 131, corresponding to the various switches as they are
actuated.
The projector unit 120 includes a projection lens 121, a liquid
crystal panel 122, a LED light source 123, a LED drive circuit 124,
a liquid crystal drive circuit 125, and a lens drive circuit 126.
The LED drive circuit 124 supplies electrical current to the LED
light source 123 according to a LED drive signal that is outputted
from the CPU 131. And the LED light source 123 illuminates the
liquid crystal panel 122 with a brightness corresponding to the
electrical current that is supplied.
The liquid crystal drive circuit 125 creates a liquid crystal panel
drive signal according to image data that is outputted from the CPU
131, and drives the liquid crystal panel 122 with this drive signal
that it has created. In concrete terms, it applies a voltage
corresponding to the image signal to each picture element in the
liquid crystal layer. The arrangement of the liquid crystal
molecules in this liquid crystal layer to which voltage has been
applied changes so as to change the transitivity for light of the
liquid crystal layer. By modulating the light from the LED light
source 123 in this manner according to the image signal, the liquid
crystal panel 122 generates an optical image.
The lens drive circuit 126 drives the projection lens 121 forwards
and backwards along a direction that is orthogonal to its optical
axis, according to a control signal that is outputted from the CPU
131. The projection lens 121 projects the optical image that is
emitted from the liquid crystal panel 122 upon a screen or the
like. The projection unit 120 starts projection when an actuation
signal for starting projection is inputted to the CPU 131 from the
actuation members 110, and, according to this actuation signal, the
projector unit 120 receives a projection command that is outputted
by the CPU 131.
According to commands from the CPU 131, the projection unit 120
projects an image that corresponds to any one of (1) through (4)
described below. Each time the actuation signal from the display
changeover switch 104 is inputted, the CPU 131 issues a changeover
command to the projector unit 120 to change over the projected
image of (1) through (4) cyclically in order through
(1).fwdarw.(2).fwdarw.(3).fwdarw.(4).fwdarw.(1) . . . . However, if
the electronic camera 200 is not mounted upon the cradle 100 then
(1) and (2) are skipped; and, if no memory card 150 is loaded into
the cradle 100, then (3) is skipped.
(1) A replay image according to image data that is transmitted from
the electronic camera 200 via the digital interface line ("Digital
I/F") of the camera interface 137;
(2) A replay image according to a video signal that is transmitted
from the electronic camera 200 via the video interface line ("VIDEO
I/F") of the camera interface 137;
(3) A replay image according to image data that is recorded in the
memory card 150;
(4) A time instant display image that shows the time measured by
the CPU 131.
When projecting an image that corresponds to (1) described above
through the cradle 100, the CPU 131 performs expansion processing
if the image data received from the electronic camera 200 is
compressed, and also resizing processing to generate a reduced size
image from the image data. This resizing processing is processing
for creation of reduced size image data whose data size is smaller
than that of the image data that has been received, corresponding
to the projection resolution of the projector unit 120 (that is the
number of picture elements that make up the liquid crystal panel
122, for example 640.times.480 dots). The liquid crystal drive
circuit 125 creates a liquid crystal panel drive signal using this
reduced size image data after resizing. And, when the reduced size
image data has been generated, the CPU 131 stores this reduced size
image data in the memory card 150.
The image data that the cradle 100 has received from the electronic
camera 200 is adapted to be capable of being transferred to an
external device (for example a DVD recorder/player or a monitor
camera or the like) that is connected via the LAN interface (LAN
I/F) 134, or to another external device (for example the personal
computer 300, a printer, a photo data storage device, or the like)
that is connected via the USB interface (USB I/F) 135. When
transferring this image data, based upon the details that are set
in advance with an actuation menu or the like, the image data
received by the cradle 100 may be transmitted just as it is, or
reduced size image data may be transmitted after resizing
processing such as described above. Due to this structure, it is
possible to copy image data from the electronic camera 200 via the
cradle 100 to another electronic device.
When projecting an image that corresponds to (2) described above
through the cradle 100, the CPU 131 creates projection image data
that corresponds to the projection resolution of the projector unit
120, using that video signal. And the liquid crystal drive circuit
125 creates a liquid crystal panel drive signal using this
projection image data that has been created. The video signal
described above corresponds to the contents that is displayed upon
the main liquid crystal display unit 201 of the electronic camera
200, and may be a photographic image, may be a menu setting screen,
or may be a display that specifies the operational state of the
electronic camera 200.
When projecting an image that corresponds to (3) described above
from the cradle 100, the CPU 131 reads out from the memory card 150
the reduced size image data whose date and time of recording is the
most recent (i.e., among the recorded image data, the image data
that has been photographed last). And the liquid crystal drive
circuit 125 creates the liquid crystal panel drive signal using
this reduced size image data that has been read out from the memory
card 150.
When an actuation signal is inputted from the backward switch 102
in the state in which an image corresponding to (3) described above
is being projected, then the CPU 131 reads out from the memory card
150 the reduced size image data for one frame earlier than the
image that is currently being projected. And the liquid crystal
drive circuit 125 creates a liquid crystal panel drive signal based
upon this reduced size image data that has newly been read out from
the memory card 150. By doing this, instead of the image that is
being currently projected, the image one frame before is now
projected by the projector unit 120.
And, when an actuation signal is inputted from the forward switch
103 in the state in which an image corresponding to (3) described
above is being projected, then the CPU 131 reads out from the
memory card 150 the reduced size image data for one frame later
than the image that is currently being projected. And the liquid
crystal drive circuit 125 creates a liquid crystal panel drive
signal based upon this reduced size image data that has newly been
read out from the memory card 150. By doing this, instead of the
image that is being currently projected, the image one frame later
is now projected by the projector unit 120.
Moreover, when an actuation signal is inputted from the delete
switch 105 in the state in which an image corresponding to (3)
described above is being projected, then the CPU 131, along with
deleting the reduced size image data that corresponding to the
image that is being projected from the memory card 150, also reads
out from the memory card 150 the reduced size image data for one
frame earlier than the deleted data. And the liquid crystal drive
circuit 125 creates a liquid crystal panel drive signal based upon
this reduced size image data that has newly been read out from the
memory card 150. By doing this, along with deleting the data
corresponding to the image that is being projected, the image one
frame earlier is now projected by the projector unit 120.
And, when projecting an image that corresponds to (4) described
above from the cradle 100, the CPU 131 creates projection image
data that shows the current time instant, using the timing
information provided by the timer circuit. And the liquid crystal
drive circuit 125 creates a liquid crystal panel drive signal based
upon this projection image data that has been created.
The Electronic Camera
Referring to FIG. 2, the electronic camera 200 includes an imaging
unit 220, a CPU 231, a memory 232, actuation members 210, an
external interface (I/F) 233, a mike 234, a speaker 235, the main
liquid crystal display unit 201, a battery 236, a charging circuit
237, and a cradle interface 238. A memory card 250 that can be
fitted to and removed from a memory slot not shown in the figures
is also provided. Apart from the actuation member 202 upon the rear
surface described previously, the actuation members 210 also
include the main switch (Power) and the release button 205 upon the
upper surface.
Based upon a camera control program, the CPU 231 performs
predetermined calculations or the like using signals that are
inputted from the various sections that make up the electronic
camera 200, and performs control of the operation of the camera by
outputting control signals to the various sections of the
electronic camera 200. It should be understood that this camera
control program is stored in a non-volatile memory within the CPU
231, not shown in the figures.
The memory 232 is used as a working memory for the CPU 231. The
memory card 250 consists of a non-volatile memory such as a flash
memory or the like, and, upon commands from the CPU 231, data can
be written thereto, stored therein, and read out therefrom.
Upon command from the CPU 231, the external interface (I/F) 233
performs sending and receipt of data to and from another external
device (for example a printer or a photo data storage device or the
like) that is connected via an interface cable (not shown in the
figures).
Upon command from the CPU 231, the mike 234 converts audio that it
has captured into an electrical signal and outputs it to the CPU
231. This audio signal data is recorded upon the memory card 250
during sound recording. And, upon command from the CPU 231, the
speaker 235 replays audio according to audio data that is outputted
from the CPU 231. The actuation members 210 output actuation
signals to the CPU 231 in correspondence to the switches thereof
which are actuated.
The main liquid crystal display unit 201 displays information such
as an image or text or the like, upon command from the CPU 231.
This text information may be the operational state of the
electronic camera 200, the contents of an actuation menu, or the
like.
The battery 236 consists of a rechargeable battery, and supplies
the electrical power that is required by the various sections
within the electronic camera 200. And the charging circuit 237
charges up the battery 236 with a charging electrical current that
is supplied from the cradle 100 via the cradle interface 238.
When this electronic camera 200 is mounted upon the cradle 100, the
cradle interface 238 performs data communication with the cradle
100 and reception of charging electrical current. In this cradle
interface 238, there are included a control interface line
("Control I/F") that sends and receives control signals, a video
interface line ("VIDEO I/F") that sends and receives video signals,
a digital interface line ("Digital I/F") that sends and receives
image data and/or audio data, and a power supply line that supplies
charging electrical current.
The imaging unit 220 includes a photographic lens 225, an image
sensor 221, a lens drive circuit 222, and an imaging unit control
CPU 223. A CCD or a CMOS image sensor or the like may be used as
the image sensor 221. The imaging unit control CPU 223, along with
drive controlling the image sensor 221 and the lens drive circuit
222 according to commands from the CPU 231, also performs
predetermined image processing upon the image capture signals (the
accumulated electric charge signals) that are outputted from the
image sensor 221. This image processing is white balance processing
and gamma processing and the like.
And, upon receipt of a zoom control signal from the imaging unit
control CPU 223, the lens drive circuit 222 drives a zoom lens (not
shown in the figures) that is incorporated in the photographic lens
225 to a tele side or a wide side, according to the control signal.
The photographic lens 225 forms an image of the photographic
subject to be imaged upon the image-capturing surface of the image
sensor 221. And the imaging unit control CPU 223 controls the image
sensor 221 to start capturing an image. After this image capture
has ended, the imaging unit control CPU 223 reads out the
accumulated electric charge signals from the image sensor 221, and
outputs them as image data to the CPU 231 after having performed
the above described image processing thereupon.
It is arranged to be possible for the image data that has been
inputted to the CPU 231 to be recorded upon the memory card 250,
and/or to be transmitted to the cradle 100 via the cradle interface
238. It should be understood that it is also possible for the audio
data that has been captured by the mike 234 to be recorded upon the
memory card 250 together with the image data, or to be transmitted
to the cradle 100 via the cradle interface 238.
Since the present invention is particularly distinguished by the
operation of the above described electronic camera system on the
cradle side, accordingly the explanation will focus upon the
control of the cradle 100.
FIG. 3 is a flow chart for explanation of the flow of the main
processing program that is executed by the CPU 131 of the cradle
100. The processing in FIG. 3 is started when a predetermined power
supply voltage is applied to the CPU 131 of the cradle 100 and the
electronic camera 200 is mounted upon the cradle 100. The system is
constructed so that, when the electronic camera 200 is mounted upon
the cradle 100, the cradle interface 238 and the camera interface
137 are directly connected together. The CPU 131 may, for example,
detect the signal level upon some predetermined terminal within the
camera interface 137 at predetermined time intervals so as to
determine whether the electronic camera 200 is mounted or not based
upon this detected value.
In a step S1 of FIG. 3, the CPU 131 sends a command to the external
power supply circuit 136 to start the supply of charging electrical
current to the electronic camera 200, and then the flow of control
proceeds to a step S2. Due to this, if the battery voltage of the
battery 236 is less than some predetermined value, then charging up
of the battery 236 is performed.
In this step S2, the CPU 131 decides whether or not the projection
switch is ON. If an actuation signal has been inputted from the
projection switch (on/off) 101, then the CPU 131 makes an
affirmative decision in the step S2 and proceeds to a step S3,
while, if no actuation signal is being inputted, then the CPU 131
makes a negative decision in this step S2 and the processing of
FIG. 3 is terminated. The cradle 100 is adapted to terminate the
supply of charging electrical current automatically, when the
battery voltage of the battery 236 of the electronic camera 200
reaches a predetermined value.
In the step S3, the CPU sends a command to the external power
supply circuit 136 and interrupts the supply of charging electrical
current to the electronic camera 200, and then the flow of control
proceeds to a step S4.
In this step S4, the CPU 131 commands the electronic camera 200 to
perform power supply ON processing and to turn the liquid crystal
display OFF, and then the flow of control proceeds to a step S5. In
concrete terms, an ON-command signal is transmitted to the
electronic camera 200 via the control interface line ("Control
I/F"). And the CPU 231 of the electronic camera 200 is adapted to
perform power supply ON processing for the electronic camera 200,
according to this ON command signal. Since, along with the ON
command signal described above, the CPU 131 further transmits a
signal that commands the display of the main display unit 201 to be
turned OFF, accordingly the electronic camera 200 puts the display
of the main display unit 201 into the OFF state immediately after
the power supply ON processing.
In the step S5, the CPU 131 decides whether or not the power supply
of an external device that is connected to the cradle 100 is turned
ON. If the power supply of an external device that is connected via
the LAN interface (LAN I/F) 134, or the power supply of an external
device that is connected via the USB interface (USB I/F) 135, is
turned ON, then the CPU 131 makes an affirmative decision in the
step S5 and the flow of control proceeds to a step S6. If the power
supply of an external device is not on (including the case in which
no external device is connected) then the CPU 131 makes a negative
decision in the step S5 and the flow of control proceeds to a step
S13. This decision as to whether the power supply is ON or OFF
(including non-connection) is performed by communicating (i.e.
attempting communication) via the LAN interface (LAN I/F) 134 or
via the USB interface (USB I/F) 135, based upon a predetermined
protocol. If communication is effective then it is decided that the
power supply is ON, whereas if communication cannot be established
then it is decided that the power supply is OFF.
In the step S6, the CPU 131 decides whether or not transfer of the
image data that is recorded within the electronic camera 200 to the
exterior device has been completed. The CPU 131, for example,
refers to an image data transfer management table to decide whether
or not the transfer of the image data has been completed. If it is
decided that transfer has been completed, then the CPU 131 reaches
an affirmative decision in this step S6, and the flow of control
proceeds to a step S15. But if the CPU 131 decides that transfer is
not yet completed, then it reaches a negative decision in this step
S6, and the flow of control proceeds to a step S7. It could be
arranged for this image data transfer management table to be stored
within the memory 132 of the cradle 100, or for it to be stored in
a data storage device within the external device.
In the step S7, the CPU 131 starts data transfer to the external
device that is connected, and then the flow of control proceeds to
a step S8. In concrete terms, along with reading out the
non-transferred image data from the memory card 250 of the
electronic camera 200 and recording it in the memory 132, the image
data that has been recorded in the memory 132 is sent to the
external device. In this data transfer, among the image data
recorded in the memory card 250, the transfer is performed in order
from the image that has been photographed most recently (i.e. whose
recording date and time are the newest). Further, the CPU 131
performs expansion processing if the image data that has been
recorded in the memory 132 has been subjected to compression
processing, then performs resizing processing upon the image data
after expansion processing corresponding to the projection
resolution of the projector unit 120, and then records the data
after resizing in the memory card 150. If the recording region in
the memory card 150 is insufficient, then, if and only if the
recording date and time of the image data recorded in the memory
card 250 of the electronic camera 200 are later than the recording
date and time of the image data that is recorded upon the memory
card 150, this newer image data is recorded in the memory card 150
and the old image data is deleted, so that overwriting (updating)
recording with the new image data that has been read out from the
memory card 250 of the electronic camera 200 is performed. By doing
this, on the one hand the resized image data having the later date
and time of photography is recorded, while on the other hand the
resized image data is deleted from that having the earliest date
and time of photography onwards.
In the step S8 the CPU commands the projector unit 120 to start
projection, and then the flow of control proceeds to a step S9. Due
to this, the LED drive circuit 124 turns ON the LED light source
123. And in the step S9 the CPU 131 commands the projector unit 120
to project "transfer under way", and then the flow of control
proceeds to a step S10. Due to this, the display "transfer under
way" that indicates the state of communication is displayed upon
the liquid crystal drive panel 122 by the liquid crystal drive
circuit 125.
In the step S10 the CPU 131 decides whether or not the transfer of
the image data has been completed. If all of the image data that
was decided in the step S6 as not yet transferred have now been
transferred to the external device, then the CPU 131 makes an
affirmative decision in the step S10 and the flow of control is
transferred to a step S15, while if some non-transferred data still
remains, then a negative decision is made in this step S10 and the
above decision processing is repeated.
In the step S13, the CPU 131 commands the projector unit 120 to
start projection, and then the flow of control proceeds to a step
S14. Due to this, the LED drive circuit 124 turns ON the LED light
source 123. And in the step S14 the CPU 131 commands the projector
unit 120 to project "communication error", and then the flow of
control proceeds to a step S15. Due to this, the display
"communication error" that indicates the state of communication is
displayed upon the liquid crystal drive panel 122 by the liquid
crystal drive circuit 125. "Communication error" corresponds to
communication having become ineffective.
In the step S15, the CPU 131 reads out the image data after
resizing recorded in the memory card 150, and performs replay
processing. In this replay processing, based upon the details that
are set in advance with an actuation menu or the like, the image
data may be read out so as to change over the image projected by
the cradle 100 automatically at predetermined intervals (in a so
called slide show), or the image data may be read out so as to
change over the projected image in response to actuation signals
from the backward switch 102 and the forward switch 103. The image
data that is read out by the CPU 131 is sent to the liquid crystal
drive circuit 125 of the projector unit 120. Furthermore, if an
actuation signal has been inputted from the display changeover
switch 104, then the CPU 131 issues changeover commands to the
projection unit 120 so as to change over the projected images
described in (1) through (4) above cyclically, in correspondence to
the actuation signal. It should be understood that the image
projected by the step S15 corresponds to the case (3) described
above.
In a step S16, the CPU 131 decides whether or not the projection
switch is ON. If the actuation signal from the projection switch
(on/off) 101 is being continuously inputted, then the CPU 131 makes
an affirmative decision in the step S16 and returns to the step
S15, while if the actuation signal is not being inputted, then a
negative decision is reached in the step S16, and the flow of
control is transferred to a step S11.
In this step S11 the CPU 131 commands the projector unit 120 to
terminate projection, and then the flow of control proceeds to a
step S12. Due to this, the LED drive circuit 124 turns OFF the LED
light source 123.
In the step S12 the CPU 131 issues a command to the external power
supply circuit 136 and resumes the supply of charging electrical
current to the electronic camera 200, and then the processing of
the FIG. 3 flow chart terminates. Due to this, the battery 236 of
the electronic camera 200 is charged up, until the battery voltage
of the battery 236 reaches a predetermined value.
According to the first embodiment described above, the following
operations and advantages can be obtained.
(a) According to an ON signal from the projection switch (on/off)
101 (i.e. an affirmative decision in the step S2), the cradle 100
that is equipped with the projector unit 120 commands the power
supply to the electronic camera 200 that is mounted in the cradle
200 to be turned ON and the display of its main liquid crystal
display unit 201 to be turned OFF (in the step S4). Thus, when
projection is to be performed, not only is the labor for turning
the power supply to the electronic camera 200 ON saved, but also
the display by the main liquid crystal display unit 201 is turned
OFF. Accordingly it is possible to reduce the amount of electrical
power that is consumed by the electronic camera 200.
(b) The CPU 131 is provided in the cradle 100, and it is arranged
for expansion processing to be performed by this CPU 131, if the
image data that is transmitted from the electronic camera 200 to
the cradle 100 is compressed. Due to this, the cradle 100 is
enabled to handle the image data, irrespective of whether or not
the image data is compressed.
(c) The CPU 131 of the cradle 100 performs resizing processing upon
the image data that has been subjected to expansion processing in
the above stage (b), according to the projection resolution of the
projector unit 120, and records the data after resizing in the
memory card 150. And the CPU 131 reads out this image data after
resizing from the memory card 150 and performs replay processing
for the image data to project it via the projector unit 120. Since
the recording capacity of the memory card 150 may be kept to the
necessary minimum according to the projection resolution of the
projector unit 120, accordingly the beneficial effect is obtained
of economizing the capacity of the memory card 150 that is
used.
(d) The CPU 131 of the cradle 100 transfers the image data from the
electronic camera 200 via the cradle 100 to the external device (in
the step S7), and, when the transfer ends (an affirmative decision
in the step S10) reads out the image data after resizing that has
been recorded in the memory card 150 in the step (c) described
above and performs replay processing for the image data to project
the replay image with the projector unit 120 (in the step S15).
When the transfer ends, by the image being projected automatically,
the viewer is able to check the contents of the transfer by
observing the large image that is projected.
(e) The CPU 131 reads out the image data that is recorded upon the
memory card 150 and performs replay processing thereupon, and, in
the state in which the replay image is being projected with the
projector unit 120 (in the step S15), the projected image can be
cyclically changed over according to (1) through (4) as described
above in correspondence to the actuation signal from the display
changeover switch 104. Due to this, it is possible to project the
replay image with the projector unit 120, irrespective of the data
format and the signal format of the image that is inputted from the
electronic camera 200 to the cradle 100.
(f) When an image corresponding to (2) above is being projected in
correspondence to the actuation signal from the display changeover
switch 104, the video signal that is created by the CPU 231 of the
electronic camera 200 is transmitted from the electronic camera 200
to the cradle 100 via the video interface line ("VIDEO I/F"), and
the projector unit projects a replay image according to this video
signal. Due to this, since normally it is possible to project the
image that is displayed upon the main liquid crystal display unit
201 of the electronic camera 200 via the projector unit 120 in a
larger form, accordingly the viewer is able to observe, upon the
screen, an image that is larger than that on the liquid crystal
display unit 201.
In the above explanation, it was arranged for the image data
transmitted from the electronic camera 200 to the cradle 100 to be
recorded upon the memory card 150, and for the CPU 131 to read out
the replay image from the memory card 150 and to perform replay
processing thereupon, and then to project this image via the
projector unit 120 (in the step S15). However, instead of
transmitting the image data from the electronic camera 200 to the
cradle 100, it would also be acceptable to arrange for the memory
card 250, upon which the image data has been recorded by the
electronic camera 200, to be directly loaded into the memory slot
106 of the cradle 100, and for the CPU 131 to read out the replay
image directly from the memory card 250 and to perform replay
processing thereupon, and then to project this image via the
projector unit 120.
Moreover, with regard to the projection in the step S9 of "transfer
under way", it would also be acceptable to arrange to specify the
state of the transfer in more detail. For example, "camera cradle"
or "cradle external device" (in this example, a personal computer)
may be projected. Furthermore, it would also be acceptable to
arrange to display the state of progress from the start of the
transfer to the end of the transfer with a bar graph.
In the step S15, when performing projection in the slide show
format, the projection was performed by reading out (acquiring)
images, among the image data recorded upon the memory card 150, in
order from the one that was photographed first (i.e. whose date and
time of recording is the oldest). Instead of this, it would also be
acceptable to arrange to acquire and to project images in order
from the one that was photographed last (i.e. whose date and time
of recording is the newest).
Although it was made to be possible to change over the projected
image cyclically in correspondence to (1) through (4) as described
above according to the actuation signal from the display change
over switch 104, it would also be acceptable additionally to
project (5) a charging display image that indicates the state of
charge of the camera battery 236. The CPU 131 then would change
over the projected image cyclically in correspondence to (1)
through (5) as described above according to the actuation signal
from the display changeover switch 104. It would be acceptable to
arrange for data that indicates this state of charge to be received
from the electronic camera 200 via the control interface line
("Control I/F") ; or it would also be acceptable to arrange for
this data to be generated by the CPU 131 based upon change of the
charging electrical current from the external power supply circuit
136.
The CPU 131 of the cradle 100 is arranged to perform resizing
processing upon the image data that has been subjected to expansion
processing according to the projection resolution of the projector
unit 120, and to record the data in the memory card 150 after it
has thus been resized. Instead of a removable recording medium like
the memory card 150, it would also be acceptable to arrange to
record the data after resizing processing upon a flash memory or a
hard disk drive that is fixed within the cradle 100 (i.e. that is
mounted upon its circuit board or in its casing).
Apart from the external device being the personal computer 300
described above, a printer, a DVD recorder/player, a monitor
camera, or a photo data storage device, it would also be acceptable
to arrange to connect a hard disk drive (HDD), a CD-R/RW device, a
MD recording and replay device, a MO recording and replay device, a
television device, a FDA, a portable telephone device, a digital
album device, a digital photo stand, a door phone, or the like.
Second Embodiment
It would also be acceptable, after the decision upon the end of
data transfer in the step S10 of FIG. 3, not to perform image
projection, but instead to resume charging. FIG. 4 is a flow chart
for explanation of the flow of a main processing program according
to a second embodiment. The processing of this FIG. 4 is performed
instead of the processing of FIG. 3.
Since the feature by which FIG. 4 differs, as compared to FIG. 3,
is that after an affirmative decision in the step S10 the flow of
control is transferred to the step S11, accordingly the explanation
will focus upon this point of difference. If, in the step S10, all
of the image data that it was decided in the step S9 was not
transferred has now been transferred to the external device, then
the CPU 131 reaches an affirmative decision in this step S10, and
the flow of control proceeds to the step S11. If some
non-transferred data still is present, then a negative decision is
reached in the step 310 and this decision processing is
repeated.
In this step S11, the CPU 131 commands the projector unit 120 to
terminate projection, and then the flow of control proceeds to the
step S12. Due to this, the LED drive circuit 124 turns the LED
light source 123 OFF.
According to the second embodiment as explained above, the CPU 131
of the cradle 100 transfers the image data from the electronic
camera 200 to the external device via the cradle 100 (in the step
S7), and when the transfer is completed (an affirmative decision in
the step S10), the charging that was interrupted in the step S3 is
resumed (in the step S12) and the processing of FIG. 4 is
terminated. Due to this, when confirmation of the details of the
transfer is not required, then it is possible to resume the
charging immediately after termination of the transfer.
Although it is arranged for the detection that the electronic
camera 200 is mounted upon the device mounting section 100S of the
cradle 100 is performed by detecting the signal level upon a
predetermined terminal within the camera interface 137, it would
also be acceptable to perform this detection magnetically by
utilizing a magnet or the like.
An example has been explained in which the electronic camera 200 is
directly mounted upon the device mounting section 100S of the
cradle 100, and in which the cradle interface 238 and the camera
interface 137 are physically connected together. Instead of this,
it would also be acceptable to arrange to provide a structure in
which, even though the electronic camera 200 is not directly
mounted upon the device mounting section 100S, transmission and
reception of signals and transmission and reception of charging
electrical power between the electronic camera 200 and the cradle
100 is performed by wireless communication.
If a projector unit is also provided to the electronic camera 200,
then it will be acceptable to perform projection with this
projector unit on the electronic camera 200, provided that the
resolution of the projector unit on the electronic camera 200 is
higher than the resolution of the projector unit on the cradle 100.
In this case, projection with the projector unit 120 on the cradle
100 is not performed. Resolution information about the projector
units is exchanged by communication between the CPU 231 (of the
electronic camera 200) and the CPU 131 (of the cradle 100).
Although, as an example of the structure of the projector unit 120,
it was explained that an optical image formation element was
constructed using the liquid crystal panel 122, and an optical
image was obtained by illuminating the image upon the liquid
crystal panel 122 with the light of the LED light source 123, it
would also be acceptable to arrange to provide a structure using an
light-emitting type optical image formation element. In this case,
the optical image formation element is constructed by arraying
point light sources corresponding to the picture elements, and this
optical image formation element creates an optical image by causing
light of luminance corresponding to the image signal to be emitted
by each of these picture elements.
Although in the above description, by way of example, an electronic
camera 200 has been explained as an electronic device that handles
images, the present invention could also be applied to a portable
telephone unit that transmits and receives electronic data, or to a
PDA, a photo data storage device, or the like.
Thus, although in the above explanation various embodiments and
variant embodiments have been described, the present invention is
not to be considered as being limited by these particular details.
Other modes are also to be considered as being included within the
range of the present invention, provided that they are considered
as being within the range of the technical concept of the present
invention.
The contents of the disclosure of the following patent application,
upon which priority is claimed, are hereby incorporated by
reference:
Japanese Patent Application 2004-343540 (filed on 29 Nov.
2004).
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